Cutler Hammer, Div of Eaton Corp EACR Series Current Sensor Catalog
CurrentWatch™ Current Sensors
1
EACR Series Current Sensor
CA05311005E
August 2007
EACR Series Current Sensor
CurrentWatch Current Sensors
Contents
Overview . . . . . . . . . . . . . . . . . . . . . 1
Model Selection,
Switches . . . . . . . . . . . . . . . . . . . . 2
Model Selection,
Accessories . . . . . . . . . . . . . . . . . . 3
Wiring Diagram . . . . . . . . . . . . . . . 3
Specifications . . . . . . . . . . . . . . . . . 3
Dimensions . . . . . . . . . . . . . . . . . . . 4
The CurrentWatch EACR Series
current sensor family from Eaton’s
electrical business combines a current
sensor and a “True RMS” signal
conditioner into a single package. The
EACR Series provides True RMS
output on distorted waveforms found
on VFD or SCR outputs, and on linear
loads in “noisy” power environments.
Available in solid- or split-core
housings.
For typical applications of the CurrentWatch EACR Series, see listing to the
right.
Approvals
UL Listed
■
■
C-UL Listed
True RMS AC Current Sensing with 4 – 20 mA Output
Jumper-Selectable
Input Current Ranges
Split- and Solid-Core Models
to Fit Your Application
Built-In Mounting
Product Features
forms like VFD or SCR outputs
■
Jumper-Selectable Ranges — Reduces inventory and eliminates zero and
span
■
Isolation — Output is magnetically isolated from the input for safety and
elimination of insertion loss (voltage drop)
UL, C-UL and CE Approved — Accepted worldwide
■
True RMS Output — True RMS technology is accurate on distorted wave-
■
Typical Applications
VFD Controlled Loads — Monitoring VFD output indicates how the motor
■
Unless otherwise noted, the
products contained in this
document are not designed
or intended for use in human
safety applications.
and attached load are operating
■
SCR Controlled Loads — Accurate measurement of phase angle fired or
burst fired (time proportioned) SCRs, with faster current measurement than
temperature sensors
■
Switching Power Supplies and Electronic Ballasts — True RMS sensing is
the most accurate way to measure power supply or ballast input power
Why “True RMS”?
The current waveform of a typical linear load is a pure sine wave. In VFD and
SCR applications, however, output waveforms are rough approximations of a
sine wave. There are numerous spikes and dips in each cycle. The CurrentWatch EACR Series current sensors use a mathematical algorithm called
“True RMS” which integrates the actual waveform over time. The output is
the amperage component of the true power (heating value) of the AC current
waveform. True RMS is the only way to accurately measure distorted AC
waveforms. Select the EACR Series sensors for nonlinear loads in “noisy”
power environments.
For Customer Service in the U.S. call 1-877-ETN CARE (386-2273) ,
in Canada call 1-800-268-3578 .
For Application Assistance in the U.S. and Canada
call 1-800-426-9184 .
For more information visit: www.eaton.com
CA05311005E
August 2007
Example Application — CurrentWatch EACR Series
Current Sensing for Non-linear AC Loads
137.2A
Two-Wire Installation
Is Fast and Easy
Controller
True RMS Output
even on VFDs or SCRs
L
I
N
E
54.7Hz
VFD
Model Selection — CurrentWatch EACR Series
Power Supply Aperture Size Output Signal Current Range Catalog Number
Top Terminal Current Sensors
Solid-Core Housings
24V DC Loop-Powered 0.74 in. (19 mm) 4 – 20 mA 2 or 5A
CurrentWatch™ Current Sensors
EACR Series Current Sensor
Field
Selectable
Ranges
Motor
2
EACR0420SC
Split-Core Housings
Stocked product, typical order quantities guaranteed in stock.
24V DC Loop-Powered 0.85 in. (21.6 mm) 4 – 20 mA 2 or 5A
10, 20 or 50A
100, 150 or 200A
10, 20 or 50A
100, 150 or 200A
EACR1420SC
EACR2420SC
EACR0420SP
EACR1420SP
EACR2420SP
CA05311005E For more information visit: www.eaton.com
Loading...